KYORITSU MODEL 4200 Clamp Earth Tester | No auxiliary earth spikes, 20 / 200 / 1500 Ω, True RMS current 0.1 mA–30 A, φ32 mm

KYORITSU MODEL 4200 Clamp Earth Tester: Measure by Clamping the Earth Wire

Overview

The MODEL 4200 is a KYORITSU clamp earth tester for multi-point earthing systems: clamping the earth wire measures earth resistance without driving auxiliary earth spikes. Single-point earths cannot be measured this way and require a 3-pole earth tester (such as the KEW 4105A). It has a noise filter and shows NOISE when noise is excessive.

Key Specifications

• Earth resistance: 20.00 / 200.0 / 1500 Ω auto-ranging; ±1.5%±0.05 Ω (0.00–20.99 Ω) to ±10%±10 Ω (400–599 Ω); 600–1580 Ω displayed only, accuracy not guaranteed
• AC current: 100.0 / 1000 mA / 10.00 / 30.0 A (50 / 60 Hz), True RMS, ±2%
• Principle: Constant-voltage injection, current detection (approx. 2400 Hz)
• Jaw: Conductor diameter approx. φ32 mm
• Memory: 100 records
• Standards: IEC 61010-1 CAT IV 300 V; IEC 61010-2-032
• Power and weight: 4 × AA, approx. 12 h with R6, approx. 24 h with LR6; 246 × 120 × 54 mm, approx. 780 g (including batteries)

Applications

• Earth resistance inspection of distribution lines and multi-point earthing systems in buildings.
• Leakage current measurement on earth wires.

Specifications per the KYORITSU English-site product page and MODEL 4200 catalog (retrieved 2026-10-21).